What does the term 'Tempo' indicate in a TAF?

The correct interpretation of the term 'Tempo' in a TAF (Terminal Aerodrome Forecast) relates specifically to temporary variations in weather conditions that are expected to last for a brief duration. The chosen answer indicates that these variations can persist between 30 to 60 minutes. This is essential for pilots and aviation personnel as it highlights short-term changes that may impact flight operations, allowing for better planning and safety measures.

In the context of a TAF, understanding 'Tempo' is crucial, as it signifies transient weather phenomena rather than sustained changes or indications of longer forecast periods. The precision of this definition ensures that those in aviation can prepare for any immediate weather challenges without misinterpreting the duration and severity of weather changes outlined in a TAF.